以前的天空是多么湛蓝,森林是多么葱绿,处处富有生机,而现在的天空却灰蒙蒙,生机盎然的森林少之又少。都是人类的不良行为导致的恶果。在我的学校也时常发生一种不好的现象。有一天我们上完课正往食堂的方向走,发现有几个高年级学生站在花坛上乱蹦乱跳,毫不在意嫩绿的植物和鲜艳的小花,把它们弄得东倒西歪。即使这样,那几个高年级学生还不尽兴,他们又把注意力转向旁边一棵嫩绿的小树,用脚使劲踹小树。正在这时一位老师走过来把他们拽下来,训斥了他们一顿。我走近一听, How blue the sky was in the past, how green the forest is, and where life is full of vitality, and now the sky is overcast and the forest full of vitality is few and far between. All are the evil consequences of human misconduct. In my school is also often a bad phenomenon. One day we went to the canteen on the lesson, and found that a few upperclassmen were jumping around on the flower beds, indifferent to verdant plants and brightly colored flowers, and making them falter. Even then, several senior students did not enjoy themselves. They turned their attention to a green tree next to each other and made their feet stir. Just then a teacher came over and dragged them down, scolding them for a meal. I approached,